CONCENTRATION OF RISKS (Narrative) (Details) |
12 Months Ended | |||
|---|---|---|---|---|
Dec. 31, 2017 |
Dec. 31, 2016 |
Dec. 31, 2015 |
Apr. 16, 2012 |
|
| Foreign currency exchange rate risk | ||||
| Appreciation and depreciation of the RMB against US dollar (as a percent) | (6.30%) | 7.20% | 4.40% | |
| Minimum [Member] | ||||
| Foreign currency exchange rate risk | ||||
| Daily floating range of RMB trading prices against the U.S. dollar (as a percent) | 0.50% | |||
| Maximum [Member] | ||||
| Foreign currency exchange rate risk | ||||
| Daily floating range of RMB trading prices against the U.S. dollar (as a percent) | 1.00% | |||
| Customer Concentration Risk [Member] | Sales Revenue, Goods, Net [Member] | ||||
| Concentration Risk [Line Items] | ||||
| Concentration risk percentage | 32.00% | 28.00% | 25.00% | |
| Supplier Concentration Risk [Member] | Cost of Goods, Total [Member] | ||||
| Concentration Risk [Line Items] | ||||
| Concentration risk percentage | 95.00% | 72.00% | 94.00% | |